Common Problems with the
2024 Peugeot 508 (Gen 2)

On 1.5 BlueHDi (DV5) and 2.0 BlueHDi (DW10) diesel engines, the integrated AdBlue SCR tank system is a frequent failure point. The internal dosing pump, heating element, or tank pressure sensors suffer electronic faults or urea crystallization, or the tank deforms. This triggers an amber UREA warning, emissions engine fault light, and an unyielding countdown preventing engine restart once the countdown reaches zero. Rectification typically demands replacing the entire sealed plastic tank assembly, as individual pump and sensor modules cannot be serviced separately.

On 1.2 PureTech petrol models, the engine uses a wet timing belt running directly submerged in hot engine oil. Using incorrect oil formulations, short urban trip fuel dilution, or age causes the belt's rubber compound to crack and shed fibrous debris. This dislodged debris collects in the oil sump and clogs the oil pump pickup strainer screen, causing oil starvation, brake vacuum pump loss of servo assistance, and eventual bottom-end engine seizure. Stellantis lowered the belt replacement interval and issued technical service actions.

On 508 Hybrid 225 and 508 PSE (Peugeot Sport Engineered) plug-in hybrid variants, the single-phase on-board charger (OBC) module or charging port solenoid can fail to lock or handshake with UK Type 2 wallboxes. Additionally, software calibration faults within the battery management system (BMS) can trigger traction system warnings, refuse to engage pure Electric mode, or throttle electric motor assist. In rare cases internal cell imbalance in the 11.8 kWh traction pack requires high-voltage technician intervention.

The fastback coupe styling of the 508 Gen 2 uses frameless side glass that must automatically drop slightly when the door handle is pulled and rise into the weatherstrip upon closing. In freezing UK winter conditions, the glass frequently freezes solid against the rubber seals, causing the anti-pinch mechanism to trigger or damaging the electric window regulator cables and plastic clips. Over time, worn or dry window seals also lead to wind buffeting, high-speed cabin whistle, and damp ingress along the door cards.

The i-Cockpit system on the 508 combines a 12.3-inch configurable digital instrument cluster with an 8-inch or 10-inch central touchscreen running NAC infotainment firmware. Software stability issues, slow telematics processors, and loose rear harness grounds frequently manifest as frozen displays, complete touchscreen blackouts, lost Bluetooth or smartphone mirroring connectivity, and delayed heater controls. In most instances dealer ECU and telematics firmware reflashes cure the glitch, though hardware screen replacement is occasionally required.